content: /*
   * Copyright 2017 David Karnok
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package hu.akarnokd.reactive4javaflow.impl.operators;
  
  import hu.akarnokd.reactive4javaflow.*;
  import hu.akarnokd.reactive4javaflow.functionals.CheckedFunction;
  import hu.akarnokd.reactive4javaflow.fused.ConditionalSubscriber;
  
  import java.util.Optional;
  
  public final class ParallelMapOptional<T, R> extends ParallelFolyam<R> {
  
      final ParallelFolyam<T> source;
  
      final CheckedFunction<? super T, ? extends Optional<? extends R>> mapper;
  
      public ParallelMapOptional(ParallelFolyam<T> source, CheckedFunction<? super T, ? extends Optional<? extends R>> mapper) {
          this.source = source;
          this.mapper = mapper;
      }
  
      @Override
      public int parallelism() {
          return source.parallelism();
      }
  
      @Override
      protected void subscribeActual(FolyamSubscriber<? super R>[] subscribers) {
          int n = subscribers.length;
  
          FolyamSubscriber<T>[] parent = new FolyamSubscriber[n];
  
          for (int i = 0; i < n; i++) {
              FolyamSubscriber<? super R> s = subscribers[i];
              if (s instanceof ConditionalSubscriber) {
                  parent[i] = new FolyamMapOptional.MapConditionalSubscriber<>((ConditionalSubscriber<? super R>) s, mapper);
              } else {
                  parent[i] = new FolyamMapOptional.MapSubscriber<>(s, mapper);
              }
          }
  
          source.subscribe(parent);
      }
  }
  